Percentage Aptitude Questions Practice Question and Answer
8 Q: A’s income is 60% of B’s income, and A’s expenditure is 70% of B’s expenditure. If A’s income is 75% of B’s expenditure, find the ratio of A’s saving to B’s saving?
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5dbfb52017d85f0ae378714e- 15 : 1false
- 21 : 5true
- 33.5 : 1false
- 42 : 7false
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Answer : 2. "1 : 5"
Q: Tonu invested 10 % more than the investment of Monu and Sonu invested 10 % less than the investment of Monu. If the total investment of all the three persons is ₹ 60, 000, the investment of Monu is –
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5e6b85708fcee56af203d114- 1₹ 30,000false
- 2₹ 40,000false
- 3₹ 10,000false
- 4₹ 20,000true
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Answer : 4. "₹ 20,000 "
Q: A man's annual income has increased by Rs. 5 lakhs but the tax on income that he has to pay has reduced from 12 % to 10 %. He now pays Rs. 10,000 more income tax. What is his increased income (in Rs. lakhs)?
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5ef570c8d7fe8173219bf5de- 115false
- 210false
- 320false
- 425true
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Answer : 4. "25"
Q: The price of sugar increases by 15%. By what percentage should the consumption of sugar be decreased so that the expenditure on the purchase of sugar remains the same? [Give your answer correct to 2 decimal places.]
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643d140332185cce373eec85- 111.11%false
- 212.5%false
- 314.16%false
- 413.04%true
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Answer : 4. "13.04%"
Explanation :
To solve this problem, let's denote:
- Initial price of sugar = P
- Initial quantity consumed = Q
- Initial expenditure = PQ
After the price increases by 15%, the new price becomes 1.15P.
To keep the expenditure constant, the new quantity consumed (let's call it Q') can be calculated using the formula:
New expenditure = New price × New quantity
Setting the new expenditure equal to the initial expenditure:
PQ = (1.15P) * Q'
Now, solve for Q':
Q' = PQ / (1.15P)
Simplify:
Q' = Q / 1.15
Now, let's find the percentage decrease in consumption:
Percentage decrease = [(Q - Q') / Q] * 100
Substituting the value of Q':
Percentage decrease = [(Q - (Q / 1.15)) / Q] * 100
Percentage decrease = [(Q * (1 - 1/1.15)) / Q] * 100
Percentage decrease ≈ [(1 - 0.8696) * 100] ≈ 13.04%
Therefore, the consumption of sugar should be decreased by approximately 13.04% to keep the expenditure on the purchase of sugar the same after a 15% increase in price.
Q: If the diameter of a wire is decreased by 10% by how much per cent (approximately) will the length be increased to keep the volume constant?
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605c569f22ce9764eb4d0d6f- 15%false
- 217 %false
- 320 %false
- 423 %true
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Answer : 4. "23 %"
Q: The hourly wages of a mason have increased by 25%. Since the increase, the number of hours he works daily has reduced by 16%. If he was earning Rs. 120 per day before the increase, how much (in Rs.) is he earning now?
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61b1ece579954245bc064e16- 1124.5false
- 2115.5false
- 3126true
- 4120false
- 5None of thesefalse
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Answer : 3. "126"
Q: The sum of the numbers of boys and girls in a school is 150. If the number of boys is x, the number of girls becomes x% of the total number of students. The number of boys is:
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5e205ee27925ca44aa9f2257- 190false
- 275false
- 325false
- 460true
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Answer : 4. "60"
Q: Hari and Mohan contested a panchayat election. Hari got 52 percent votes and defeated Mohan by a margin of 90 votes. What was the total turnout in the election.
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5fe1b9494c864b4aa0de315b- 12500false
- 22200false
- 32250true
- 42100false
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